Originally Posted by bling_singh
I think it's somewhere in between the two. Right of way was to the car in front of the OP's boy. After he makes his right turn, the window for a left turn has closed as the OP's boy is approaching the intersection.
Dude turning left was already attempting the turn while the car ahead was turning right. On top of that the driver does a very quick lane change without losing speed. Likely an unsafe move charge against the OP's boy and failure to yeild on a left turn against the white van/SUV.
Ya makes sense. All the posts above are valid, I was just under the impression no matter what the person making the left has to make sure the path is clear before he proceeds. Like I said I could be wrong, its good to know though.